[Openmcl-devel] macOS 10.9 now required for 1.12-dev

[R. Matthew Emerson]

CCL on the Macintosh is henceforth going to require at least OS X Mavericks (10.9).

The 1.11 branch will continue to target 10.6, but the upcoming 1.12 release will require 10.9.

This enables the darwinx8632 lisp kernel Makefile to use the cc driver program to link, rather than invoking ld directly.  I believe this will make it possible to recompile the lisp kernel with just Xcode installed.  Installing the command-line tools shouldn't be required.

(https://github.com/Clozure/ccl/commit/c9156894b656201bbcbc35457e8fa3f4435b1e0a is the commit in question.)

Of course, 32-bit support is clearly on the way out on the Mac, but in the meanwhile, it's still working.